Re: Questions about btree_gin vs btree_gist for low cardinalitycolumns - Mailing list pgsql-general

On 2019-05-30 21:00:57 +0200, Peter J. Holzer wrote:
> Firstly, the GIN index doesn't generally index single characters. It
> uses some rule to split the field into tokens. For example, for a text
> field, it might split the field into words (possibly with some
> normalization like case-folding and stemming) for an int array it might
> use the values in the array, etc.

That was misleading: For a full text index you don't actually index the
column. You index ts_vector(columne). It is ts_vector which does the
tokenization, not the access method itself.

        hp

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